A geographic variation gradient in frogs, by Karl P. Schmidt.

v.20:no.29(1938)

Courtship and mating behavior in snakes, by D. Dwight Davis.

v.20:no.22(1936)

Snakes of the genus Tantilla in the United States, by Frank N. Blanchard.

v.20:no.28(1938)

The distribution of Bidder's organ in the Bufonidae, by D. Dwight Davis.

v.20:no.15(1936)

Orthoptera from Iraq and Iran, by B.P. Uvarov.

v.20:no.33(1938)

Notes on Central American and Mexican coral snakes, by Karl P. Schmidt.

v.20:no.20(1936)

Notes on Bahaman reptiles and amphibians, by Karl P. Schmidt.

v.20:no.16(1936)

New reptiles and amphibians from Honduras, by Karl P. Schmidt.

v.20:no.4(1933)

A new crocodile from the Philippine Islands, by Karl P. Schmidt.

v.20:no.8(1935)

Records and measurements of neotropical bats.

v.20:no.13(1936)

New mammals from Guatemala and Honduras.

v.20:no.11(1935)

Guatemalan salamanders of the genus Oedipus, by Karl P. Schmidt.

v.20:no.17(1936)

A new woodrat from Mexico, by Wilfred H. Osgood.

v.20:no.35(1938)

Notes on fishes of the family Hemirhamphidae, by Alfred C. Weed.

v.20:no.7(1933)

Notes on sea-basses of the genus Centropristes, by Alfred C. Weed.

v.20:no.23(1937)